Home / 1,880.13-2,819.28-647.13

Finding the Fourth Proportional to 1,880.13, 2,819.28 and 647.13

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Solution

The fourth proportional to 1,880.13, 2,819.28 and 647.13 is: 970.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,880.13 : 2,819.28 = 647.13 : x
  2. Step 2: Convert to fraction form
    1,880.13/2,819.28 = 647.13/x
  3. Step 3: Cross multiply
    1,880.13x = 2,819.28 × 647.13
  4. Step 4: Simplify right side
    1,880.13x = 1,824,440.67
  5. Step 5: Solve for x
    x = 1,824,440.67/1,880.13
  6. Step 6: Final answer
    x = 970.38

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.